22415140 has 48 divisors (see below), whose sum is σ = 51791040. Its totient is φ = 8081280.

The previous prime is 22415123. The next prime is 22415143. The reversal of 22415140 is 4151422.

It is not an unprimeable number, because it can be changed into a prime (22415143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30214 + ... + 30946.

It is an arithmetic number, because the mean of its divisors is an integer number (1078980).

Almost surely, 2^22415140 is an apocalyptic number.

22415140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22415140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25895520).

22415140 is an abundant number, since it is smaller than the sum of its proper divisors (29375900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22415140 is a wasteful number, since it uses less digits than its factorization.

22415140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 22415140 is about 4734.4630107331. The cubic root of 22415140 is about 281.9554445644.

Adding to 22415140 its reverse (4151422), we get a palindrome (26566562).

It can be divided in two parts, 2241 and 5140, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 22415140 in words is "twenty-two million, four hundred fifteen thousand, one hundred forty".